projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| b9e1c0d6 MK |
1 | /* Native-dependent code for VAX UNIXen (including older BSD's). |
| 2 | ||
| 3 | Copyright 2004 Free Software Foundation, Inc. | |
| 4 | ||
| 5 | This file is part of GDB. | |
| 6 | ||
| 7 | This program is free software; you can redistribute it and/or modify | |
| 8 | it under the terms of the GNU General Public License as published by | |
| 9 | the Free Software Foundation; either version 2 of the License, or | |
| 10 | (at your option) any later version. | |
| 11 | ||
| 12 | This program is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | GNU General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU General Public License | |
| 18 | along with this program; if not, write to the Free Software | |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 | Boston, MA 02111-1307, USA. */ | |
| 21 | ||
| 22 | #include "defs.h" | |
| 23 | #include "inferior.h" | |
| 24 | ||
| 25 | #include "gdb_assert.h" | |
| 26 | #include <sys/types.h> | |
| 27 | #include <sys/dir.h> | |
| 28 | #include <sys/user.h> | |
| 29 | ||
| 30 | #ifdef HAVE_SYS_PTRACE_H | |
| 31 | #include <sys/ptrace.h> | |
| 32 | #endif | |
| 33 | ||
| 34 | #ifndef PT_READ_U | |
| 35 | #define PT_READ_U 3 | |
| 36 | #endif | |
| 37 | ||
| 38 | #ifdef SYS_REG_H | |
| 39 | /* UNIX 32V and derivatives (including 3BSD). */ | |
| 40 | #include <sys/reg.h> | |
| 41 | #else | |
| 42 | /* 4.2BSD and derivatives. */ | |
| 43 | #include <machine/reg.h> | |
| 44 | #endif | |
| 45 | ||
| 46 | #include "vax-tdep.h" | |
| 47 | ||
| 48 | /* Address of the user structure. This is the the value for 32V; 3BSD | |
| 49 | uses a different value, but hey, who's still using those systems? */ | |
| 50 | CORE_ADDR vax_kernel_u_addr = 0x80020000; | |
| 51 | ||
| 52 | /* Location of the user's stored registers; usage is `u.u_ar0[XX]'. | |
| 53 | For 4.2BSD and ULTRIX these are negative! See <machine/reg.h>. */ | |
| 54 | static int vax_register_index[] = | |
| 55 | { | |
| 56 | R0, R1, R2, R3, R4, R5, | |
| 57 | R6, R7, R8, R9, R10, R11, | |
| 58 | AP, FP, SP, PC, PS | |
| 59 | }; | |
| 60 | ||
| 61 | CORE_ADDR | |
| 62 | vax_register_u_addr (CORE_ADDR u_ar0, int regnum) | |
| 63 | { | |
| 64 | gdb_assert (regnum >= 0 && regnum < ARRAY_SIZE (vax_register_index)); | |
| 65 | ||
| 66 | /* Type is `int *u_ar0'. See <sys/user.h>. */ | |
| 67 | return u_ar0 + vax_register_index[regnum - VAX_R0_REGNUM] * 4; | |
| 68 | } | |
| 69 | \f | |
| 70 | ||
| 71 | CORE_ADDR | |
| 72 | vax_register_u_offset (int regnum) | |
| 73 | { | |
| 74 | size_t u_ar0_offset = offsetof (struct user, u_ar0); | |
| 75 | CORE_ADDR u_ar0; | |
| 76 | int pid; | |
| 77 | ||
| 78 | errno = 0; | |
| 79 | pid = PIDGET (inferior_ptid); | |
| 80 | u_ar0 = ptrace (PT_READ_U, pid, u_ar0_offset, 0); | |
| 81 | if (errno) | |
| 82 | perror_with_name ("Unable to determine location of registers"); | |
| 83 | ||
| 84 | return vax_register_u_addr (u_ar0, regnum) - vax_kernel_u_addr; | |
| 85 | } | |
| 86 | \f | |
| 87 | ||
| 88 | #include <nlist.h> | |
| 89 | ||
| 90 | #ifndef _PATH_UNIX | |
| 91 | #define _PATH_UNIX "/vmunix" | |
| 92 | #endif | |
| 93 | ||
| 94 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
| 95 | void _initialize_vax_nat (void); | |
| 96 | ||
| 97 | void | |
| 98 | _initialize_vax_nat (void) | |
| 99 | { | |
| 100 | struct nlist names[2]; | |
| 101 | ||
| 102 | names[0].n_name = "_u"; | |
| 103 | names[1].n_name = NULL; | |
| 104 | if (nlist (_PATH_UNIX, names) == 0) | |
| 105 | vax_kernel_u_addr = names[0].n_value; | |
| 106 | } |